Another theory is offered by the Canadian Sentinel blog: "Liberal spy Tetreault doesn't realize that he's been used. He's been manipulated. His simple, predictable mentality has apparently been harnessed by Conservative strategists as a tool of political warfare, turned against his own guys.Post from which excerpt was taken: Liberal 'Spy' Who Took Harper Video Not Really A 'Spy'
"Really, he wasn't just a well-known Liberal/Ignatieff operative; he was actually deliberately invited by the Conservative Party, via a local official.
"What does that logically tell you? Would the Tories knowingly invite a partisan Liberal operative to a private, "hush-hush" speech if they didn't want anyone to know what Harper was going to say?"
Of course, a direct link to my post or at least the blog's main url would've been nice. It's proper netiquette.
hat tip: National Newswatch